Reflection type semiconductor display device having optical fiber adjacent the surface of the main body

ABSTRACT

A reflection type semiconductor display device which can make satisfactory display even when external light is not satisfactorily intense is provided. A reflection type semiconductor display device according to the present invention can take in light other than incident light on a liquid crystal panel to be an auxiliary light source using optical fibers, and thus, display of high quality level can be made even indoors or in a place where light is faint. Further, by combining the semiconductor display device with a front light, insufficient amount of light can be supplemented with the front light.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is directed to a reflection type semiconductordisplay device of a direct viewing type, and more particularly, to areflection type liquid crystal display device (liquid crystal panel).The present invention also relates to a semiconductor device with areflection type liquid crystal display device mounted thereon.

A semiconductor device as referred to in the present invention may be,for example, used information processing equipment such as anotebook-sized personal computer, a lap top type personal computer, anelectronic notebook, or a mobile computer, a video camera, a digitalstill camera, a car navigation system, or a cellular telephone.

2. Description of the Related Art

Recently, an intensive study and development have been carried out withregard to manufacturing technology of liquid crystal panels to make itpossible to provide liquid crystal panels at a relatively low cost.Further, as the information society where Internet, electronic mail, andthe like are utilized has been developed, notebook-sized personalcomputers (hereinafter abbreviated as notebook-sized PCs) have rapidlybecome more popular.

With regard to digital still cameras and video cameras, as they havebeen allowed to have liquid crystal panels mounted thereon such thatimages taken can be viewed on the spot, they have become widely acceptedby consumers.

Liquid crystal panels fall into two types, transmission type ones andreflection type ones. In a transmission type liquid crystal panel,illumination light is transmitted through the liquid crystal panel froma back light provided at the back so that the user can visually confirmthe display. On the other hand, a reflection type liquid crystal paneldoes not need a back light, and the display can be seen throughreflection of external light on the liquid crystal panel. Since a backlight consumes about 90% of power consumption of the so transmissiontype liquid crystal panel, power consumption of a transmission typeliquid crystal panel is large. On the other hand, though the displayquality level of a reflection type liquid crystal panel is inferior tothat of a transmission type liquid crystal panel, power consumption of areflection type liquid crystal panel is smaller than that of atransmission type liquid crystal panel, and thus, a reflection typeliquid crystal panel is advantageous when used in a notebook-sized PC ora mobile PC.

One reason for the inferiority of the display quality level of areflection type liquid crystal panel to that of a transmission typeliquid crystal panel could be the insufficient amount of light when itis used indoors.

These days, in order to solve the problem of the insufficient amount oflight, a technique to provide a reflection type liquid crystal panelwith a front light is adopted to supplement the insufficient amount oflight when it is used indoors. However, in this case, since afluorescent lamp similar to that used as a back light of a transmissiontype liquid crystal panel is used as the front light, leading to largerpower consumption, the advantage of a reflection type liquid crystalpanel cannot be obtained.

SUMMARY OF THE INVENTION

Accordingly, the present invention has been made in view of the aboveproblem, and an object of the invention is to provide a reflection typesemiconductor display device having a high display quality level withoutinsufficiency in the amount of light even when it is used indoors.

In order to solve the above problem, according to the present invention,light other than incident light on a liquid crystal panel is utilized asan auxiliary light source for a reflection type semiconductor displaydevice.

FIG. 1 shows a schematic structural view of a reflection typesemiconductor display device using a reflection type liquid crystalpanel according to the present invention. Reference numerals 101, 102,and 103 denote a main body, a reflection type liquid crystal panel, andan optical fiber array, respectively. The optical fiber array 103includes a plurality of optical fiber cables 104. Each of the opticalfiber cables 104 is a bundle of a plurality of optical fibers, examplesthereof being shown in FIGS. 2A and 2B. The optical fiber array is usedas means for taking in external light.

In FIGS. 2A and 2B, reference numeral 201 denotes an optical fiber, anenlargement thereof being shown at the lower portion in FIGS. 2A and 2B.The optical fiber 201 has a core and a clad. The index of refraction ofthe core is larger than that of the clad, and light travels as itrepeats total internal reflections at the interface between the core andthe clad. A coating 202 is formed of a resin or the like. A reinforcingmaterial 203 is formed of a resin or the like.

It is to be noted that, in the optical fiber cable 104 shown in FIG. 2A,a bundle of tightly packed optical fibers is covered with the coating202. Further, in the optical fiber cable 104 shown in FIG. 2B, thereinforcing material 203 fills the space among the optical fibers toimprove the strength.

Next, reference is made to FIG. 3. FIG. 3 shows a sectional view of areflection type liquid crystal panel according to the present invention.Reference numeral 301 denotes a substrate. Reference numerals 302 and303 denote driver TFTs (thin film transistors). Reference numerals304,305,306, and 307 denote a pixel TFT, a reflection electrode, liquidcrystal, and a counter substrate, respectively. It is to be noted thatthe pixel TFT can be made of amorphous semiconductor film orpolycrystalline semiconductor film. Also, it is to be noted that atransparent electrode (not shown) is provided under the countersubstrate.

The optical fiber cables 104 are positioned such that light taken infrom one end of each of the optical fiber cables 104 is emitted from theother end thereof to the counter substrate. Consequently, incident lightentered into the optical fiber cables travels through the opticalfibers, enters the counter substrate 307, travels through the countersubstrate 307, and then enters the liquid crystal. It is to be notedthat the upper surface of the counter substrate 307 is appropriatelyprocessed to allow incident light on the liquid crystal by eliminatingthe requirement for the total internal reflections of light travelingthrough the substrate at the interface. The processing condition can bemost suitably set through simulation or the like. In FIG. 3, the uppersurface of the counter substrate 307 is formed with patterns, but thepresent invention is not limited thereto.

Alternatively, as shown in FIG. 4, the panel may be structured to use acounter substrate used in a general reflection type liquid crystal paneland a light guide plate 408. Reference numeral 401 denotes a substrate.Reference numerals 402 and 403 denote driver TFTs. Reference numerals404, 405, 406, and 407 denote a pixel TFT, a reflection electrode,liquid crystal, and a counter substrate, respectively. In this case, theupper surface of the light guide plate 408 is processed so as toeliminate the requirement for the total internal reflections of incidentlight traveling through the light guide plate 408 at the interface.

It is to be noted that any suitable means may be used to allow incidentlight taken in by the optical fiber cables 104 to travel through thecounter substrate or the light guide plate into the liquid crystal.

The present invention will be described in view of the structure.

According to the present invention, there is provided a reflection typesemiconductor display device in which light emitted from one end of anoptical fiber enters said reflection type semiconductor display device,wherein the light is external light taken in from the other end of theoptical fiber.

Further, according to the present invention, there is provided areflection type semiconductor display device in which light emitted fromone end of an optical fiber enters a counter substrate of saidreflection type semiconductor display device, wherein the light isexternal light taken in from the other end of the optical fiber.

Still further, according to the present invention, there is provided areflection type semiconductor display device in which light emitted fromone end of an optical fiber enters a light guide plate provided so as tooppose said reflection type semiconductor display device, wherein thelight is external light taken in from the other end of the opticalfiber.

Preferably, the reflection type semiconductor display device in theforegoing structures further comprises a microlens.

Preferably, the reflection type semiconductor display device in theforegoing structures further comprises a front light.

Preferably, the above-described front light comprises a LED.

BRIEF DESCRIPTION OF THE DRAWINGS

In the accompanying drawings:

FIG. 1 is schematic structural view of a reflection type semiconductordisplay device according to present invention;

FIGS. 2A and 2B show examples of an optical fiber cable;

FIG. 3 is a sectional view of a reflection type liquid crystal panelaccording to the present invention;

FIG. 4 is a sectional view of a reflection type liquid crystal panelaccording to the present invention;

FIG. 5 is a schematic structural view of a notebook-sized PC with areflection type liquid crystal panel according to the present inventionmounted thereon;

FIG. 6 is a sectional view of a reflection type liquid crystal panelaccording to the present invention;

FIG. 7 is a sectional view of a reflection type liquid crystal panelaccording to the present invention;

FIG. 8 shows an optical fiber cable;

FIG. 9 shows an optical fiber and a microlens;

FIG. 10 shows an optical fiber array and a microlens array;

FIG. 11 shows an optical fiber cable;

FIG. 12 shows an optical fiber and a microlens;

FIG. 13 is a schematic structural view of a reflection typesemiconductor display device according to the present invention;

FIG. 14 is a sectional view of a reflection type liquid crystal panelaccording to the present invention;

FIG. 15 shows LEDs used in a front light;

FIGS. 16A to 16C show examples of a semiconductor device with areflection type liquid crystal panel according to the present inventionmounted thereon; and

FIGS. 17A to 17E show further examples of a semiconductor device with areflection type liquid crystal panel according to the present inventionmounted thereon.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention are described in the following. Thepresent invention, however is not limited to the following embodiments.

[Embodiment 1]

In this embodiment a liquid crystal panel according to the presentinvention is mounted on a notebook-sized PC.

Reference is made to FIG. 5, which shows the appearance of thenotebook-sized PC of the present embodiment. Reference numerals 501,502, 503, 504, and 505 denote a main body, a keyboard, a pointingdevice, a reflection type liquid crystal panel, and an optical fiberarray, respectively.

The optical fiber array of the present embodiment has the optical fibercables 104 as shown in FIG. 2A. FIG. 6 shows a sectional view of thereflection type liquid crystal panel 504 of the present embodiment.Reference numeral 601 denotes a substrate. Reference numerals 602 and603 are driver TFTs. Reference numerals 604, 605, 606, and 607 denote apixel TFT, a reflection electrode, liquid crystal, and a countersubstrate, respectively. Dots 608 are formed on the counter substrate607.

The optical fiber cables 104 are positioned so as to emit light takeninto the counter substrate. Incident light entered into the opticalfiber cables enters the counter substrate 607, travels through thecounter substrate 607, and then enters the liquid crystal 606. It is tobe noted that the dots 608 are formed on the upper surface of thecounter substrate 607 to allow incident light on the liquid crystal byeliminating the requirement for the total internal reflections of lighttraveling through the substrate at the interface.

[Embodiment 2]

In this embodiment, the structure of the reflection type liquid crystalpanel is a modification of the notebook-sized PC described in Embodiment1.

Reference is made to FIG. 7, which shows a sectional view of thereflection type liquid crystal panel. Reference numeral 701 denotes asubstrate. Reference numerals 702 and 703 are driver TFTs. Referencenumerals 704, 705, 706, 707, and 708 denote a pixel TFT, a reflectionelectrode, liquid crystal, a counter substrate, and a light guide plate,respectively. Dots 709 are formed on the light guide plate 708.

In the present embodiment, again, light taken in the optical fibercables 104 enters the light guide plate 708, travels through the lightguide plate 708, and then enters the liquid crystal 706.

[Embodiment 3]

In this embodiment the optical fiber cables, which form the opticalfiber array used in the liquid crystal panel described in Embodiment 1or Embodiment 2, are modified as a means for solving the above-mentionedproblem.

The optical fiber array of the present embodiment is an aggregate of aplurality of optical fiber cables as shown in FIG. 8. Each of theoptical fiber cables 801 is a bundle of a plurality of optical fibers802. A microlens array 803 is positioned at an aperture of each opticalfiber cable 801 for taking in the optical fibers. A coating 804 isformed of a resin or the like.

FIG. 9 illustrates the function of a microlens 803-1 forming themicrolens array 803 of the present embodiment. The microlens array. 803is an aggregate of a plurality of microlenses 803-1. FIG. 9 shows onemicrolens 803-1 for illustrative purposes. The size of the microlens803-1 substantially equals to that of the clad of the optical fiber 802.The microlens 803-1 is positioned such that incident light on themicrolens 803-1 travels into the core of the optical fiber 802. Ofcourse, the angle of incidence of light into the core of the opticalfiber 802 is required to be set so as to cause total internalreflection. The structure of the present embodiment makes it possible tocondense into the core the incident light on the clad of the opticalfiber, which results in obtaining a large amount of light even with asmall area.

FIG. 10 schematically shows the positioning of the microlenses 803-1corresponding to the optical fibers 802 forming the optical fiber cable801. It is to be noted that, in practice, in an optical fiber cable, theoptical fibers 802 and the corresponding microlenses 803-1 thereto aredisposed three-dimensionally.

[Embodiment 4]

In this embodiment, the optical fiber cables, which form the opticalfiber array used in the notebook-sized PC described in Embodiment 1 orEmbodiment 2, are modified.

Reference is made to FIG. 11. The optical fiber array of the presentembodiment is an aggregate of a plurality of optical fiber cables 1101as shown in FIG. 11. Each of the optical fiber cables 1101 is a bundleof a plurality of optical fibers 1102. A microlens array 1103 ispositioned at an aperture of each optical fiber cable 1101 for taking inthe optical fibers. A coating 1104 is formed of a resin or the like. Areinforcing material 1105 is formed of a resin or the like.

FIG. 12 shows a microlens 1103-1 forming the microlens array 1103 of thepresent embodiment. The microlens array 1103 is an aggregate of aplurality of microlenses 1103-1. FIG. 12 shows one microlens 1103-1 forillustrative purposes. The size of the microlens 1103-1 is larger thanthat of the clad of the optical fiber 1102. The microlens 1103-1 ispositioned such that incident light on the microlens 1103-1 travels intothe core of the optical fiber 1102. Of course, the angle of incidence oflight into the core of the optical fiber 1102 is required to be set soas to cause total internal reflection. The structure of the presentembodiment makes it possible to condense into the core the incidentlight on the microlens 1103-1, which results in obtaining a large amountof light.

[Embodiment 5]

In this embodiment, a notebook-sized PC is described having means forsolving the above-mentioned problem or a plurality of the optical fiberarrays as described in Embodiments 1-4.

FIG. 13 is a schematic structural view of a reflection typesemiconductor display device using a reflection type liquid crystalpanel according to the present invention. Reference numerals 1301 and1302 denote a main body and a reflection type liquid crystal panel,respectively. An optical fiber array 1303 has a plurality of opticalfiber cables 1304. Though, in the present embodiment, four optical fiberarrays 1303 are used, the number thereof may be more or less than four.

[Embodiment 6]

In this embodiment, the structure of the reflection type liquid crystalpanel described in the above embodiments further uses a front light asan auxiliary light source.

FIG. 14 shows a sectional view of the reflection type liquid crystalpanel of the present embodiment. Reference numeral 1401 denotes asubstrate. Reference numerals 1402 and 1403 denote driver TFTs.Reference numerals 1404, 1405, and 1406 denote a pixel TFT, a reflectionelectrode, and liquid crystal, respectively. A counter substrate 1407 issimilar to the counter substrate shown in FIG. 3. Reference numeral 1408denotes an optical fiber cable. A front light 1409 is formed of aplurality of LEDs. Alternatively, the front light 1409 may be afluorescent lamp.

FIG. 15 shows LEDs forming the front light used in the presentembodiment. LEDs for emitting R (red), G (green), and B (blue) light areintegrally formed on a resin substrate to be used as a white lightsource.

In the present embodiment, in the case where auxiliary light from theoptical fibers is not sufficient, the front light is lighted, and thus,the front light is normally set as non-operational.

[Embodiment 7]

The semiconductor device using the reflective type liquid crystal panelprovided with the auxiliary light source as the optical fiber arrayaccording to the present invention has various applications. In thepresent embodiment, such a semiconductor device will be described.

Semiconductor devices of this type include a video camera, a stillcamera, a car navigation system, a personal computer, and a portableinformation terminal (such as a mobile computer and a cellulartelephone), examples of which are shown in FIGS. 16A to 16C and FIGS.17A to 17E.

FIG. 16A shows a cellular telephone formed of a main body 1601, a voiceoutput portion 1602, a voice input portion 1603, a reflection typeliquid crystal panel 1604, an optical fiber array 1605, a control switch1606, and an antenna 1607.

FIG. 16B shows a video camera formed of a main body 1608, a reflectiontype liquid crystal panel 1609, an optical fiber array 1610, a voiceinput portion 1611, a control switch 1612, a battery 1613, and an imagereception portion 1614.

FIG. 16C shows a mobile computer formed of a main body 1615, areflection type liquid crystal panel 1616, an optical fiber array 1617,a camera portion 1618, an image reception portion 1619, and a controlswitch 1620.

FIG. 17A shows a personal computer formed of a main body 2001, an imageinput portion 2002, a reflection type liquid crystal panel 2003, akeyboard 2004, and an optical fiber array 2005.

FIG. 17B shows a goggles type display formed of a main body 2101, areflection type liquid crystal panel 2102, an arm portion 2103, and anoptical fiber array 2104.

FIG. 17C shows a player using a recording medium with a program recordedtherein (hereinafter referred to as a recording medium) and formed of amain body 2201, a reflection type liquid crystal panel 2202, a speakerportion 2203, a recording medium 2204, a control switch 2205, and anoptical fiber array 2206. It is to be noted that, with this device,listening to music, watching movies, playing games, and enjoyingInternet can be done with a DVD (digital versatile disc), a CD, or thelike used as the recording medium.

FIG. 17D shows a digital camera formed of a main body 2301, a reflectiontype liquid crystal panel 2302, a viewfinder 2303, a control switch2304, an optical fiber array 2305, and an image reception portion (notshown).

FIG. 17E shows a portable electronic book formed of a main body 2401, areflection type liquid crystal panels 2402 and 2403, a recording medium2404, a control switch 2405, an antenna 2406, and an optical fiber array2407.

According to a reflection type semiconductor display device of thepresent invention, light other than incident light on a liquid crystalpanel can be taken in to be an auxiliary light source using opticalfibers, and thus, a display of high quality can be made even indoors orin a place where light is faint.

Further, by combining the semiconductor display device with a frontlight, an insufficient amount of light can be supplemented with thefront light.

What is claimed is:
 1. A reflection type semiconductor display devicecomprising: a first substrate; a plurality of reflective pixelelectrodes over said first substrate; a second substrate provided so asto oppose said first substrate; a liquid crystal provided between saidfirst substrate and said second substrate; and an optical fiber havingfirst and second ends, wherein said second end of said optical fiber isdisposed adjacent to a surface of a main body of said display device,and wherein an external light enters said second end and is emitted fromsaid first end adjacent to an edge of said second substrate so as toenter said second substrate.
 2. A reflection type semiconductor displaydevice comprising: a first substrate; a plurality of reflective pixelelectrodes over said first substrate; a second substrate provided so asto oppose said first substrate; a liquid crystal provided between saidfirst substrate and said second substrate; and an optical fiber havingfirst and second ends, wherein said second end of said optical fiber isdisposed adjacent to a surface of a main body of said display device sothat an external light can enter said second end, and wherein said firstend is operationally connected to an edge of said second substrate.
 3. Areflection type semiconductor display device comprising: a firstsubstrate; a plurality of reflective pixel electrodes over said firstsubstrate; a second substrate provided so as to oppose said firstsubstrate; a liquid crystal provided between said first substrate andsaid second substrate; a light guide plate over said second substrate;and an optical fiber having first and second ends, wherein said secondend of said optical fiber is disposed adjacent to a surface of a mainbody of said display device, and wherein an external light enters saidsecond end and is emitted from said first end adjacent to an edge ofsaid light guide plate so as to enter said light guide plate.
 4. Areflection type semiconductor display device comprising: a firstsubstrate; a plurality of reflective pixel electrodes over said firstsubstrate; a second substrate provided so as to oppose said firstsubstrate; a liquid crystal provided between said first substrate andsaid second substrate; a light guide plate over said second substrate;and an optical fiber having first and second ends, wherein said secondend of said optical fiber is disposed adjacent to a surface of a mainbody of said display device so that an external light can enter saidsecond end, and wherein said first end is operationally connected to anedge of said light guide plate.
 5. A reflection type semiconductordisplay device of claim 4, wherein said reflective pixel electrodes areconnected to thin film transistors.
 6. A reflection type semiconductordisplay device of claim 4, further comprising a transparent conductivelayer under said second substrate.
 7. A reflection type semiconductordisplay device of claim 1, further comprising a microlens at said secondend of said optical fiber.
 8. A reflection type semiconductor displaydevice of claim 2, further comprising a microlens at said second end ofsaid optical fiber.
 9. A reflection type semiconductor display device ofclaim 3, further comprising a microlens at said second end of saidoptical fiber.
 10. A reflection type semiconductor display device ofclaim 4, further comprising a microlens at said second end of saidoptical fiber.
 11. A reflection type semiconductor display device ofclaim 1, further comprising a front light adjacent to said edge.
 12. Areflection type semiconductor display device of claim 2, furthercomprising a front light adjacent to said edge.
 13. A reflection typesemiconductor display device of claim 3, further comprising a frontlight adjacent to said edge.
 14. A reflection type semiconductor displaydevice of claim 4, further comprising a front light adjacent to saidedge.
 15. A reflection type semiconductor display device of claim 7,further comprising a front light adjacent to said edge.
 16. A reflectiontype semiconductor display device of claim 8, further comprising a frontlight adjacent to said edge.
 17. A reflection type semiconductor displaydevice of claim 9, further comprising a front light adjacent to saidedge.
 18. A reflection type semiconductor display device of claim 10,further comprising a front light adjacent to said edge.
 19. A reflectiontype semiconductor display device of claim 11, wherein said front lightcomprises an LED.
 20. A reflection type semiconductor display device ofclaim 12, wherein said front light comprises an LED.
 21. A reflectiontype semiconductor display device of claim 13, wherein said front lightcomprises an LED.
 22. A reflection type semiconductor display device ofclaim 14, wherein said front light comprises an LED.
 23. A reflectiontype semiconductor display device of claim 15, wherein said front lightcomprises an LED.
 24. A reflection type semiconductor display device ofclaim 16, wherein said front light comprises an LED.
 25. A reflectiontype semiconductor display device of claim 17, wherein said front lightcomprises an LED.
 26. A reflection type semiconductor display device ofclaim 18, wherein said front light comprises an LED.
 27. A cellulartelephone having the reflection type semiconductor display device ofclaim
 1. 28. A video camera having the reflection type semiconductordisplay device of claim
 1. 29. A mobile computer having the reflectiontype semiconductor display device of claim
 1. 30. A personal computerhaving the reflection type semiconductor display device of claim
 1. 31.A goggles type display having the reflection type semiconductor displaydevice of claim
 1. 32. A player using a recording medium having thereflection type semiconductor display device of claim
 1. 33. A digitalcamera having the reflection type semiconductor display device ofclaim
 1. 34. A portable electronic book having the reflection typesemiconductor display device of claim
 1. 35. A cellular telephone havingthe reflection type semiconductor display device of claim
 2. 36. A videocamera having the reflection type semiconductor display device of claim2.
 37. A mobile computer having the reflection type semiconductordisplay device of claim
 2. 38. A personal computer having the reflectiontype semiconductor display device of claim
 2. 39. A goggles type displayhaving the reflection type semiconductor display device of claim
 2. 40.A player using a recording medium having the reflection typesemiconductor display device of claim
 2. 41. A digital camera having thereflection type semiconductor display device of claim
 2. 42. A portableelectronic book having the reflection type semiconductor display deviceof claim
 2. 43. A cellular telephone having the reflection typesemiconductor display device of claim
 3. 44. A video camera having thereflection type semiconductor display device of claim
 3. 45. A mobilecomputer having the reflection type semiconductor display device ofclaim
 3. 46. A personal computer having the reflection typesemiconductor display device of claim
 3. 47. A goggles type displayhaving the reflection type semiconductor display device of claim
 3. 48.A player using a recording medium having the reflection typesemiconductor display device of claim
 3. 49. A digital camera having thereflection type semiconductor display device of claim
 3. 50. A portableelectronic book having the reflection type semiconductor display deviceof claim
 3. 51. A cellular telephone having the reflection type displaydevice of claim
 4. 52. A video camera having the reflection type displaydevice of claim
 4. 53. A mobile computer having the reflection typedisplay device of claim
 4. 54. A personal computer having the reflectiontype display device of claim
 4. 55. A goggles type display having thereflection type display device of claim
 4. 56. A player using arecording medium having the reflection type display device of claim 4.57. A digital camera having the reflection type display device of claim4.
 58. A portable electronic book having the reflection type displaydevice of claim
 4. 59. A reflection type semiconductor display devicecomprising: a first substrate; a plurality of reflective pixelelectrodes over said first substrate; a second substrate provided so asto oppose said first substrate; a front light adjacent to an edge ofsaid second substrate; a liquid crystal provided between said firstsubstrate and said second substrate; and an optical fiber having firstand second ends, wherein an external light enters said second end and isemitted from said first end adjacent to said edge of said secondsubstrate so as to enter said second substrate.
 60. A reflection typesemiconductor display device of claim 59, further comprising a microlensat said second end of said optical fiber.
 61. A reflection typesemiconductor display device of claim 59, wherein said front lightcomprises an LED.
 62. A reflection type semiconductor display device ofclaim 59, wherein said display device is incorporated in one selectedfrom the group consisting of a cellular telephone, a video camera, amobile computer, a personal computer, a goggle type display, a playerusing a recording medium, a digital camera, and a portable electronicbook.